Unit and Snapshot Testing ​

via Jest

The sku test command will invoke Jest, running any tests in files named *.test.js, *.spec.js or in a __tests__ folder.

Since sku uses Jest as a testing framework, you can read the Jest documentation for more information on writing compatible tests.

Note: sku will forward all command line args to jest.

Example running tests in watch mode:

sh
$ sku test --watch

If you need to set up your test framework, you can provide a setupTests script in your config:

ts
export default {
  setupTests: 'src/setupTests.ts',
} satisfies SkuConfig;

For example, if you're using React Testing Library and wish to use the custom jest matchers provided by @testing-library/jest-dom, your setupTests script would look like this:

ts
import '@testing-library/jest-dom';

sku's Jest configuration can also be used as a preset:

js
/** @type {import('jest').Config} */
module.exports = {
  preset: 'sku',
};

This enables debugging tests in VS Code using the Jest extension, by following the instructions in the Jest documentation.